From rjl at uw.edu Mon Apr 15 15:03:38 2013
From: rjl at uw.edu (Randall J LeVeque)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] Applied Math Seminar Thursday by Diego Melgar
Message-ID:
Diego Melgar, a grad student at UCSD working with on coupling our
tsunami model to real-time earthquake warnings, will be visiting
Wednesday through Friday this week. He will describe some of his work
on Thursday afternoon, all are welcome....
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Applied Math Seminar
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Speaker: Diego Melgar, Scripps Inst. of Oceanography, UCSD
Title: Rapid Earthquake Source Models and Applications to
Near-Source Tsunami Modeling
Time and Date: 4:00pm on Thursday 18 April 2013
Place: Miller 301
Abstract:
Recent progress in real-time GPS has allowed the on-the-fly
integration of GPS and accelerometer data for broadband monitoring of
medium to large earthquakes. An innovative method for combination of
seismic and geodetic measurements via a tightly-coupled Kalman filter
will be discussed. In this scheme strong motion accelerations are
combined with raw GPS observations yielding real-time broadband strong
motion velocity and displacement waveforms. The potential these data
products hold for earthquake early warning will be addressed, with
results from several events ranging in magnitude from Mw 4.6 to Mw
9.0. Furthermore, these data products can be used to model the seismic
source; obtaining centroid moment tensor and slip inversion estimates
in only a few minutes after origin time with minimal operator
interaction. Particular emphasis will be placed on ongoing work that
gauges the impact that such rapid source models have on quick tsunami
computations and the potential for source-model based tsunami early
warning as opposed to the current data-base driven approach.
From rjl at uw.edu Thu Apr 18 08:43:28 2013
From: rjl at uw.edu (Randall J LeVeque)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] Fwd: Applied Math Seminar Thursday by Diego Melgar
In-Reply-To:
References:
Message-ID:
Reminder of the talk today...
---------- Forwarded message ----------
From: Randall J LeVeque
Date: Mon, Apr 15, 2013 at 3:03 PM
Subject: Applied Math Seminar Thursday by Diego Melgar
To: amath-current@amath.washington.edu, AMath Seminars
Diego Melgar, a grad student at UCSD working with on coupling our
tsunami model to real-time earthquake warnings, will be visiting
Wednesday through Friday this week. He will describe some of his work
on Thursday afternoon, all are welcome....
--------------------------------------------------------------------
Applied Math Seminar
--------------------------------------------------------------------
Speaker: Diego Melgar, Scripps Inst. of Oceanography, UCSD
Title: Rapid Earthquake Source Models and Applications to
Near-Source Tsunami Modeling
Time and Date: 4:00pm on Thursday 18 April 2013
Place: Miller 301
Abstract:
Recent progress in real-time GPS has allowed the on-the-fly
integration of GPS and accelerometer data for broadband monitoring of
medium to large earthquakes. An innovative method for combination of
seismic and geodetic measurements via a tightly-coupled Kalman filter
will be discussed. In this scheme strong motion accelerations are
combined with raw GPS observations yielding real-time broadband strong
motion velocity and displacement waveforms. The potential these data
products hold for earthquake early warning will be addressed, with
results from several events ranging in magnitude from Mw 4.6 to Mw
9.0. Furthermore, these data products can be used to model the seismic
source; obtaining centroid moment tensor and slip inversion estimates
in only a few minutes after origin time with minimal operator
interaction. Particular emphasis will be placed on ongoing work that
gauges the impact that such rapid source models have on quick tsunami
computations and the potential for source-model based tsunami early
warning as opposed to the current data-base driven approach.
From rjl at uw.edu Wed May 1 16:30:54 2013
From: rjl at uw.edu (Randall J LeVeque)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] Fwd: Richard Tapia visiting/speaking next week
In-Reply-To:
References:
Message-ID:
Richard Tapia from Rice University will be visiting UW Thursday
and Friday and is giving an AMath Seminar at 4pm in Miller 301, see below.
He is also giving the MathAcrossCampus talk on Friday May 3 at 3:30pm
in Kane 220 on "Math at top speed: exploring and breaking myths in the
drag racing folklore", http://www.math.washington.edu/mac/
Richard is a well known applied mathematician both for his scientific
work in optimization and related areas and for his work to increase
diversity and opportunities for under-represented minorities in the
mathematical sciences. Among many other honors he was awarded the
National Medal of Science from President Obama in 2011. His webpage
has more information about his various activities:
http://www.caam.rice.edu/~rat/
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Applied Math Seminar
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Speaker: Richard Tapia, Rice University
Title: The Isoperimetric Problem Revisited:
Extracting a Short Proof of Sufficiency from
Euler's 1744 Approach to Necessity
Time and Date: 4:00pm on Thursday 2 May 2013
Place: Miller 301
Abstract:
Our primary objective in this study is to present a short, elementary,
and teachable solution of the isoperimetric problem. A secondary
objective is to give a brief, but reasonably complete, overview of the
remarkable life of the isoperimetric problem. In 1744 Euler
constructed multiplier theory to solve the isoperimetric problem .
However, contrary to Euler's belief, satisfaction of his multiplier
rule is not a sufficient condition to demonstrate that the circle is a
solution. In 1995 in a short paper aptly entitled A Short Path to the
Shortest Path Peter Lax constructed what is currently considered to be
the shortest and most elementary of all existing proofs. This
background material is presented to set the stage for our
demonstration that Euler's approach can be extended to give a
sufficiency proof that we believe to be short and elementary and
competitive with the Lax proof from this point of view
From joelzy at uw.edu Tue May 14 13:59:21 2013
From: joelzy at uw.edu (Joel Zylberberg)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] Boeing lecture thursday: Liam Paninski
Message-ID:
Hi All,
Reminder that our next Boeing colloquium will be Thursday (details below).
The speaker is Liam Paninski. Dr. Paninski will be available to meet with
those who are interested. There are still a few spots left for lunch /
dinner, and Friday morning. If you are interested, please sign up on the google
docs page
(including
Lunch / Dinner).
- *Liam Paninski, Columbia University*
- *Challenges and Opportunities in Statistical Neuroscience*
- Thursday, May 16, 2013, 4:00pm, Miller Hall
301
--
Joel Zylberberg
Acting Assistant Professor
Department of Applied Mathematics
University of Washington
Seattle, WA
http://faculty.washington.edu/joelzy/
~ The neuroscience is theoretical, but the fun is real
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From rjl at uw.edu Tue May 21 11:56:02 2013
From: rjl at uw.edu (Randall J LeVeque)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] AMath Seminar by Yvonne Ou on Friday May 31
Message-ID:
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Applied Mathematics Seminar
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Speaker: Yvonne Ou, University of Delaware
Title: Dynamic permeability, Microstructure and dissipation in
Biot-JKD wave equations
Time: 2:30pm on Friday, May 31, 2013
Room: Savery 157
Abstract: In the geophysics and bone ultrasound applications of poroelastic
equations of Biot type, it has been observed that low-frequency Biot
equations underestimate the dissipation when compared with experimental
results. In contrast to the low-frequency theory, in which the dissipation
term is proportional to the relative fluid velocity, Biot did consider the
correction for dissipation term when the frequency is higher than a critical
value. As a consequence of this correction, the dissipation term in the
time-domain waves equations becomes a memory term. Johnson, Koplik and
Dashen (JKD) proposed a unified theory for frequency-dependent permeability,
which is termed 'dynamic' permeability, based on the causality argument.
Like high frequency Biot equations, the time domain Biot-JKD also contains a
memory term.
The focus of this talk will be on
(1) How is the microstructure of the pore space mathematically quantified in
the context of permeability?
(2) How does the causality built in the dynamic permeability provide an
efficient way for numerically handling the memory term in Biot-JKD
equations?
(3) How to go beyond the Biot-JKD parameter-fitting methodology to
construct a sample-specific permeability for a given microstructure? How to
solve the ill-posed inverse problem arising from this?
From sbrunton at uw.edu Tue May 28 07:59:09 2013
From: sbrunton at uw.edu (Steven Brunton)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] Boeing Lecture, Stanley Osher,
May 30 (Miller Hall 301)
In-Reply-To:
References:
Message-ID: <5D5F0D7A-D56A-4837-9FBD-DB99FA7B2F6D@uw.edu>
Dear All,
This Thursday (May 30th), we will have our last Boeing lecture of the year, at 4pm in 301 Miller Hall. Stanley Osher will be the speaker (details below).
Please sign up to meet with the speaker on the Google Doc page: https://docs.google.com/document/d/1b5ljVpRIJf66d1uva2kcHAGFoC2e825zpotVGwhkyCw/edit?usp=sharing
Looking forward to seeing you all there!
Best Regards,
Steve
The Magic of L1 Type Regulatization
Stanley Osher
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From sbrunton at uw.edu Wed May 29 08:49:20 2013
From: sbrunton at uw.edu (Steven Brunton)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] Re: Boeing Lecture, Stanley Osher,
May 30 (Miller Hall 301)
In-Reply-To: <5D5F0D7A-D56A-4837-9FBD-DB99FA7B2F6D@uw.edu>
References:
<5D5F0D7A-D56A-4837-9FBD-DB99FA7B2F6D@uw.edu>
Message-ID: <49249755-9C0F-4C47-8EB1-D11682E3A87B@uw.edu>
Dear All,
There are a couple of times that are still open to meet with the speaker Stan Osher on Thursday. Also, there are openings for lunch and dinner, so please sign up!
Best Regards,
Steve
On May 28, 2013, at 7:59 AM, Steven Brunton wrote:
> Dear All,
>
> This Thursday (May 30th), we will have our last Boeing lecture of the year, at 4pm in 301 Miller Hall. Stanley Osher will be the speaker (details below).
>
> Please sign up to meet with the speaker on the Google Doc page: https://docs.google.com/document/d/1b5ljVpRIJf66d1uva2kcHAGFoC2e825zpotVGwhkyCw/edit?usp=sharing
>
> Looking forward to seeing you all there!
>
> Best Regards,
> Steve
>
> The Magic of L1 Type Regulatization
> Stanley Osher
>
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